1. Beat around the bush : Not Speaking directly and avoiding or not coming on point.
2. Best of both words : It has all the advantages.
3. Bite off more than you can chew : Something which ic hectic but you like to do.
4. Blessing in disguise : Something is bad at first sight but actually is good on other side.
5. Can't judge a book by it's cover : Don't judge by the appearance.
6. Give the benefit of the doubt : Believing some statements without proof.
7.  In the heat of the moment : Doing something in that situation where you are helpless and then feel guilty about it.
8. Kill two birds with one stone : Doing one thing but actually doing two things at a time.
9. Let the cat out of the bag : Reveal information that was previously concealed.
10. Miss the boat : To miss the chance.
11. Once in a blue moon : Event that really happens rarely.
12. Take with a grain of salt : Go ahead and act.
13. Be up in the air : Being unsure.
14. Stab someone in the back : Doing bad or betraying.
15. Lose your touch : Lose your talent or abilities you had before.
16. Sit tight : You have done now wait for the results.
17. Face the music : Face the reality.
18. Rule of thumb : General rules.
19. Look like a million dollars : Somebody looks like a pile of money in manner of compliment.
20. Get over something : It is no longer emotionally effected by something or no longer leading you down.
21. Crunch time : The deadline.
22. Get out of hand : Loose control of something.
23. Get out if your system : Something you wanted to do a really long time but couldn't make it but after sometime you did,
24. Hang in there : Oh wait!
25. False Friends : Wrong friends.
26. Rags to riches : (Rags means clothes of a poor person that are torn)
27. Put your money where your mouth is : Stop talking about what you can do and start acting.
28. My two cents : You are in a conversation and nobody asks for your opinion but you feel you can contribute so you can say this is just my two cents but….
29. Cost an arm and a leg : Something is really really expensive.
30. To cook the books : Sell super funny.
31. To wear many hats : Doing a lot of stuff at once.
32. The bottom line : The most important thing.
33. Cold calling : Marketing 
34. Back to the drawing boards : One's effort has failed and one must start all over again.

I hope this was helpful!